<html>
    <head>
        <style>
            .loader {
                border: 16px solid #f3f3f3; /* Light grey */
                border-top: 16px solid #3498db; /* Blue */
                border-radius: 50%;
                width: 120px;
                height: 120px;
                animation: spin 2s linear infinite;
                text-align: center;
            }

            @keyframes spin {
                0% { transform: rotate(0deg); }
                100% { transform: rotate(360deg); }
            }
        </style>
    </head>

    <body>
        <div align="center" class="loader"></div>
    </body>
</html>
